| Monothrix congesta (M.E.Jones) Rydb. | Perityle congesta (M.E.Jones) Shinners trib. Heliantheae |
| Monothrix fastigiata (Brandegee) Rydb. | Perityle gracilis (M.E.Jones) Rydb. trib. Heliantheae |
| Monothrix intricata (Brandegee) Rydb. | Perityle intricata (Brandegee) Shinners trib. Heliantheae |
| Monothrix megalocephala (S.Watson) Rydb. | Perityle megalocephala (S.Watson) J.F.Macbr. trib. Heliantheae |
| Monothrix stansburyi (A.Gray) Rydb. | Perityle stansburyi (A.Gray) J.F.Macbr. trib. Heliantheae |